[48-44005-YC] aFe Power Twisted Steel Long Tube Headers & Y-Pipe w/ Cats (Street) - Silverado/Sierra V8-5.3L ( 2014 - 2018 )

Twisted Steel Long Tube Headers Features:

• Constructed out of 16-gauge, 1-3/4 IN mandrel-bent stainless steel tubing for unrestricted flow
• 4-to-1 formed merge collectors eliminates flow-block turbulence
• Optimized tube lengths improve flow and performance
• 100% hand MIG-welded construction ensures optimal strength and durability·

Y-Pipe Features:

• Constructed out of mandrel-bent stainless steel tubing
• True 2-to-1 mitered merge collector eliminates dead zone for improved flow
• Mandrel-bent 3 IN stainless steel tubing for better flow and added power
• Incorporates high-Flow, 400 cell catalytic converters for improved flow

Test Results:

• Added an astounding +12 HP and +13 lbs. x ft. of TQ